EFFECTS OF TEMPERATURE:
sCHANGE | HOW THE EQUILIBRIUM SHIFTS |
INCREASE IN TEMPERATURE | Equilibrium moves in the endothermic direction |
DECREASE IN TEMPERATURE | Equilibrium moves in the exothermic direction |
Example:
sIodine Monochloride reacts reversibly with Chlorine to form Iodine Trichloride:
ICl + Cl2 ⇌ ICl3
Dark Brown Yellow
When the equilibrium mixture is heated, it becomes darker brown in colour. Explain whether the backward reaction is exothermic or endothermic
s
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EFFECTS OF PRESSURE:
sCHANGE | HOW THE EQUILIBRIUM SHIFTS |
INCREASE IN PRESSURE | Equilibrium shifts in direction that produces the smaller number of molecules of gas |
DECREASE IN PRESSURE | Equilibrium shifts in direction that produces the larger number of molecules of gas |
Example:
sNitrogen Dioxide can form Dinitrogen Tetraoxide, a colourless gas
2NO2 ⇌ N2O4
Brown Gas Colourless Gas
sPredict the effect of the increase in pressure on the position of equilibrium
s Number of Molecules of Gas on the Left = 2 Number of Molecules of Gas on the Right = 1
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